#include <stdio.h>

void Hello()
{
  printf("hello world\n");
  printf("hello world\n");
  printf("hello world\n");
  printf("hello world\n");
  printf("hello world\n");
  printf("hello world\n");
}


int main()
{
  int i = 0;
  int sum = 0;
  for(i = 0;i<100;i++)
  {
    sum += i;
  }
  printf("%d\n",sum);
  
  Hello();
}
